请问这道数学jj何解阿

joyce92pipi · 发表于 2013-6-23 17:28:38

No.271	状态：求确认		更新记录：0622-2，0623
题目	百分之60的B发生A,问A、B哪个多
	Statement (1)	告诉A多少
	Statement (2)	90%是B
思路	假设总数是100x
	Statement (1)	知道A，无法求出B，NOT sufficient
	Statement (2)	B=90x，Afile://localhost/Users/apple/Library/Caches/TemporaryItems/msoclip/0/clip_image001.pngB=54x，Bfile://localhost/Users/apple/Library/Caches/TemporaryItems/msoclip/0/clip_image002.png=36x，所以（Afile://localhost/Users/apple/Library/Caches/TemporaryItems/msoclip/0/clip_image003.png）max=10x B=90x，Amax=64x，所以A<B，Sufficient
答案	B，Statement（2）ALONE is sufficient.

所属分类: GMAT考试